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  2. Atlas (rocket family) - Wikipedia

    en.wikipedia.org/wiki/Atlas_(rocket_family)

    The resulting conceptual heavy-lift vehicle was called "Atlas Phase 2" or "PH2" in the 2009 Augustine Report. An Atlas V PH2-Heavy (three 5 m stages in parallel; six RD-180s) along with Shuttle-derived , Ares V and Ares V Lite, were considered as a possible heavy lifter concept for use in future space missions in the Augustine Report. [ 29 ]

  3. Atlas II - Wikipedia

    en.wikipedia.org/wiki/Atlas_II

    The Atlas II was the last Atlas rocket to use the "stage-and-a-half" technique, where it ignited all 3 RS-56 engines at liftoff and then jettisoned the 2 RS-56-OBA side engines and their support structure during ascent. The two RS-56-OBA engines were integrated into a single unit called the MA-5A and shared a common gas generator.

  4. Comparison of orbital launch systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_orbital...

    [note 2] Liquid-propellant ... Rocket variants are not distinguished; i.e., the Atlas V series is only counted once for all its configurations 401–431, 501–551 ...

  5. Vulcan Centaur - Wikipedia

    en.wikipedia.org/wiki/Vulcan_Centaur

    Two of the 2,400-kilonewton (550,000 lbf)-thrust BE-4 engines were to be used on a new launch vehicle booster. [35] [36] [34] A month later, ULA restructured company processes and its workforce to reduce costs. The company said that the successor to Atlas V would blend existing Atlas V and Delta IV with a goal of halving the cost of the Atlas V ...

  6. National Security Space Launch - Wikipedia

    en.wikipedia.org/wiki/National_Security_Space_Launch

    The contract type for the phase 2 contracts is new for NSSL launches as it will be a "firm-fixed-price, indefinite-delivery" type of launch contract. [54] The awards in August 2020 are a major part of "the transition of the national security launch program to take advantage of commercial innovation and private investments in launch vehicles." [48]

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